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Reliability Analysis of Steam Turbine Blade Using Monte Carlo Simulation

机译:基于蒙特卡罗模拟的汽轮机叶片可靠性分析

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摘要

In this study, the reliability analysis of the low pressure steam turbine blade was performed using the Monte Carlo simulation considering variations of applied stress and strength. Applied stress under the service condition of steady state was obtained by finite element analysis. The fatigue strength under rotating bending load was evaluated by the staircase method. The most appropriate probabilistic distribution of the fatigue strength is 3-parameter Weibull distribution, which is determined by the comparative analysis. The failure probability under various loading conditions was derived from the strength-stress interference model.
机译:在这项研究中,考虑了施加应力和强度的变化,使用蒙特卡洛模拟对低压蒸汽轮机叶片进行了可靠性分析。通过有限元分析获得稳态工作条件下的施加应力。通过阶梯法评价旋转弯曲载荷下的疲劳强度。疲劳强度最合适的概率分布是通过比较分析确定的3参数威布尔分布。从强度-应力干扰模型推导了各种载荷条件下的失效概率。

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